31 lines
934 B
Dart
31 lines
934 B
Dart
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import 'package:collection/collection.dart';
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import 'package:json_annotation/json_annotation.dart';
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import 'closed_caption.dart';
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part 'closed_caption_track.g.dart';
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/// Track that contains closed captions in a specific language.
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@JsonSerializable()
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class ClosedCaptionTrack {
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/// Closed captions.
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final UnmodifiableListView<ClosedCaption> captions;
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/// Initializes an instance of [ClosedCaptionTrack].
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ClosedCaptionTrack(Iterable<ClosedCaption> captions)
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: captions = UnmodifiableListView(captions);
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/// Gets the caption displayed at the specified point in time.
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/// Returns null if not found.
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ClosedCaption? getByTime(Duration time) =>
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captions.firstWhereOrNull((e) => time >= e.offset && time <= e.end);
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///
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factory ClosedCaptionTrack.fromJson(Map<String, dynamic> json) =>
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_$ClosedCaptionTrackFromJson(json);
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///
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Map<String, dynamic> toJson() => _$ClosedCaptionTrackToJson(this);
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}
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